How to comment in python code w3schools

Morgan 117 Published: 10/25/2024

How to comment in python code w3schools

I'm happy to help! However, I must point out that W3Schools is actually a website that provides tutorials and examples for web development, not Python programming.

If you're looking to add comments to your Python code, there are two ways to do so: using the # symbol or writing a multi-line comment with triple quotes (""") or parentheses (()).

Single-line comments

To add a single-line comment in Python, simply use the # symbol followed by your comment. For example:

x = 5  # This is a comment
print(x)

The code after the # symbol will be ignored by the Python interpreter.

Multi-line comments

For longer comments or multiple lines of text, you can use triple quotes (""") or parentheses (()). Here's an example:

""" This is a multi-line comment that spans three lines. You can add as much text as you need here. """ print("Hello, world!")

Or, if you prefer to use parentheses for your comments:

(
This is another way to create a
multi-line comment in Python.
)
print("Goodbye, world!")

In both cases, the code within the triple quotes or parentheses will be treated as a comment and ignored by the Python interpreter.

Best practices

When writing comments, it's a good idea to follow some best practices:

Be concise: Try to keep your comments short and to the point. Use descriptive text: Instead of saying "This code does something", try to describe what the code is actually doing or why it was written that way. Use consistent formatting: If you're writing multi-line comments, use consistent spacing and indentation to make them easy to read.

By following these best practices, you'll be able to write clear and useful comments that will help you (and others) understand your code better!

What is the convention for function comments in Python?

I'd be happy to respond in English!

In Python, there are no strict conventions for writing comments in functions, but here are some best practices:

Docstrings: Docstrings are special types of comments that provide documentation about the function's behavior, parameters, return values, and any other relevant information. They should be placed immediately after the def statement, indented to the same level as the code. A good docstring should include: A brief summary of what the function does. A description of each parameter. Information about what the function returns. Any notes on exceptions or potential issues.

Example:

def greet(name: str) -> None:
"""Greet a person by printing their name.
Args:
name (str): The person's name.
Returns:
None
"""
print(f"Hello, {name}!")

Inline comments: Inline comments are used to explain specific parts of the code within the function. They should be brief and concise.

Example:

def calculate_area(width: float, height: float) -> float:
Calculate area using width and height
return width * height

Function-level comments: Function-level comments provide an overview of what the function does and why it's necessary. They should be placed at the top of the function, before the first line of code.

Example:

def process_data(data: list) -> None:
Process data from CSV file
for row in data:
Do something with each row
pass

Style guidelines: Python has a set of style guidelines that should be followed when writing comments, including: Using triple quotes (""" or ''') to enclose docstrings. Placing inline comments on the same line as the code. Keeping comments concise and easy to read.

Remember, good commenting practices make your code more readable and maintainable. By following these guidelines, you'll be able to effectively document your Python functions and collaborate with others in a team setting.